Restoredoll.com– Carries several hair colors that are close matches to the original pony hair. Also has a color guide with photos comparing their hair colors to actual ponies

Dollyhair.com– Similar to restoredoll.com in that they carry colors specifically for mlp’s and have a color guide with pictures of the original ponies

My Little Pony Arena– Has a wealth of pony information along with forums on just about any pony topic you can think of, and then some. There’s also an area to trade or buy ponies, a place for customs, artwork, and a lot of other extras